Inconsistency of bash behaviour on fedora aarch64 and x86_64 images

[TommyLike Hu]

Hey COPR Developers,
    Recently, I am trying to deploy COPR containers on an arm instance,
except for the base image and resalloc pool tag issues, I also found there
is a strange thing on bash command, check this code from dist-git [1] below:
```
if [ ! -w $REPODIR ] ; then
    echo "ERROR: You can not write to $REPODIR"
    echo "ERROR: You can not create repos"
    exit -1
fi
```
This would always fail in an aarch64 container which uses the identical
dockerfile as the x86 ones.
```

FROM registry.fedoraproject.org/fedora:35
MAINTAINER [e-mail]

```
Could this be a fedora issue? Considering I tried fedora 35/36/37 which all
failed.

[1]:
https://github.com/release-engineering/dist-git/blob/738dc51b8dff6f06a3d4be5...