$ git clone -n https://src.fedoraproject.org/rpms/rtkit.git /var/lib/mock/f45-build-34707-690/root/chroot_tmpdir/scmroot/rtkit
Cloning into '/var/lib/mock/f45-build-34707-690/root/chroot_tmpdir/scmroot/rtkit'...
$ git fetch origin 8ca9740a3c7ea29b21663fb4159a56bf630a3a30:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rtkit
 * [new ref]         8ca9740a3c7ea29b21663fb4159a56bf630a3a30 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8ca9740 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild