$ git clone -n https://src.fedoraproject.org/rpms/telepathy-qt.git /var/lib/mock/f40-build-2428893-60604/root/chroot_tmpdir/scmroot/telepathy-qt
Cloning into '/var/lib/mock/f40-build-2428893-60604/root/chroot_tmpdir/scmroot/telepathy-qt'...
$ git fetch origin bf2f13897eeef7255157bc98ced794f8920cd7a9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/telepathy-qt
 * [new ref]         bf2f13897eeef7255157bc98ced794f8920cd7a9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bf2f138 Orphaned for 6+ weeks