$ git clone -n https://src.fedoraproject.org/rpms/photoqt.git /var/lib/mock/f39-build-1781212-41557/root/chroot_tmpdir/scmroot/photoqt
Cloning into '/var/lib/mock/f39-build-1781212-41557/root/chroot_tmpdir/scmroot/photoqt'...
$ git fetch origin f8162494f64ba1bb6993df68ac49983682b4603d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/photoqt
 * [new ref]         f8162494f64ba1bb6993df68ac49983682b4603d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f816249 Update to 3.4