$ git clone -n https://src.fedoraproject.org/rpms/frobby.git /var/lib/mock/f45-build-9283-401/root/chroot_tmpdir/scmroot/frobby
Cloning into '/var/lib/mock/f45-build-9283-401/root/chroot_tmpdir/scmroot/frobby'...
$ git fetch origin d26126efdd9a4ab3987728873d2df06a3ab6f6ae:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/frobby
 * [new ref]         d26126efdd9a4ab3987728873d2df06a3ab6f6ae -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d26126e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild