$ git clone -n https://src.fedoraproject.org/rpms/python-indexed_gzip.git /var/lib/mock/f38-build-719266-96892/root/chroot_tmpdir/scmroot/python-indexed_gzip
Cloning into '/var/lib/mock/f38-build-719266-96892/root/chroot_tmpdir/scmroot/python-indexed_gzip'...
$ git fetch origin b599d3e53a49e97812595a7050cfe11c570ae8f4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-indexed_gzip
 * [new ref]         b599d3e53a49e97812595a7050cfe11c570ae8f4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b599d3e Update to 1.7.1 (close RHBZ#2183571)