$ git clone -n https://src.fedoraproject.org/rpms/libfullock.git /var/lib/mock/f45-build-16195-483/root/chroot_tmpdir/scmroot/libfullock
Cloning into '/var/lib/mock/f45-build-16195-483/root/chroot_tmpdir/scmroot/libfullock'...
$ git fetch origin fbb9edb173c290ec4856d6471a566abe6cf88224:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libfullock
 * [new ref]         fbb9edb173c290ec4856d6471a566abe6cf88224 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fbb9edb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild