$ git clone -n https://src.fedoraproject.org/rpms/python-black.git /var/lib/mock/f45-build-29824-641/root/chroot_tmpdir/scmroot/python-black
Cloning into '/var/lib/mock/f45-build-29824-641/root/chroot_tmpdir/scmroot/python-black'...
$ git fetch origin da6039e211c45132fe94866f52fbfc364922dbab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-black
 * [new ref]         da6039e211c45132fe94866f52fbfc364922dbab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at da6039e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild