$ git clone -n https://src.fedoraproject.org/rpms/rktime.git /var/lib/mock/f45-build-34572-688/root/chroot_tmpdir/scmroot/rktime
Cloning into '/var/lib/mock/f45-build-34572-688/root/chroot_tmpdir/scmroot/rktime'...
$ git fetch origin b8b03b53cf14d185bf8c21dd48ba5aa4073c26ee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rktime
 * [new ref]         b8b03b53cf14d185bf8c21dd48ba5aa4073c26ee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b8b03b5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild