$ git clone -n https://src.fedoraproject.org/rpms/python-lockfile.git /var/lib/mock/f45-build-31455-652/root/chroot_tmpdir/scmroot/python-lockfile
Cloning into '/var/lib/mock/f45-build-31455-652/root/chroot_tmpdir/scmroot/python-lockfile'...
$ git fetch origin 620b32d74c83011945cc5010e89813c70a32e601:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-lockfile
 * [new ref]         620b32d74c83011945cc5010e89813c70a32e601 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 620b32d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild