$ git clone -n https://src.fedoraproject.org/rpms/liborigin.git /var/lib/mock/f45-build-16720-490/root/chroot_tmpdir/scmroot/liborigin
Cloning into '/var/lib/mock/f45-build-16720-490/root/chroot_tmpdir/scmroot/liborigin'...
$ git fetch origin bb604028445ecf24a58c7379127c23b2b1fe2fc3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/liborigin
 * [new ref]         bb604028445ecf24a58c7379127c23b2b1fe2fc3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb60402 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild