[freeipa PR#983][opened] makerpms.sh: make git checkout optional

[tomaskrizek]

   URL: https://github.com/freeipa/freeipa/pull/983
Author: tomaskrizek
 Title: #983: makerpms.sh: make git checkout optional
Action: opened

PR body:
"""
In case someone is using the script from tarball, outside of git,
the git checkout command shouldn't fail the script.

Related https://pagure.io/freeipa/issue/6605

Signed-off-by: Tomas Krizek <tkrizek(a)redhat.com&gt;
"""

To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/983/head:pr983
git checkout pr983