$ git clone -n https://src.fedoraproject.org/rpms/tortoisehg.git /var/lib/mock/f39-build-1627520-39386/root/chroot_tmpdir/scmroot/tortoisehg
Cloning into '/var/lib/mock/f39-build-1627520-39386/root/chroot_tmpdir/scmroot/tortoisehg'...
$ git fetch origin 177f3b8df9cc7cf5948a447fbfec49657f323ba8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tortoisehg
 * [new ref]         177f3b8df9cc7cf5948a447fbfec49657f323ba8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 177f3b8 tortoisehg 6.5.1