$ git clone -n https://src.fedoraproject.org/rpms/python-blessings.git /var/lib/mock/f45-build-29798-641/root/chroot_tmpdir/scmroot/python-blessings
Cloning into '/var/lib/mock/f45-build-29798-641/root/chroot_tmpdir/scmroot/python-blessings'...
$ git fetch origin b8be734415e7b0c0dcec87bb05ae03cdc8908b36:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-blessings
 * [new ref]         b8be734415e7b0c0dcec87bb05ae03cdc8908b36 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b8be734 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild