$ git clone -n https://src.fedoraproject.org/rpms/libcanlock.git /var/lib/mock/f45-build-15923-480/root/chroot_tmpdir/scmroot/libcanlock
Cloning into '/var/lib/mock/f45-build-15923-480/root/chroot_tmpdir/scmroot/libcanlock'...
$ git fetch origin d0b0d67318d92498b1b94db22e9706059247e307:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libcanlock
 * [new ref]         d0b0d67318d92498b1b94db22e9706059247e307 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d0b0d67 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild