$ git clone -n https://src.fedoraproject.org/rpms/dgit.git /var/lib/mock/f45-build-7462-364/root/chroot_tmpdir/scmroot/dgit
Cloning into '/var/lib/mock/f45-build-7462-364/root/chroot_tmpdir/scmroot/dgit'...
$ git fetch origin 66c68f7ce552dae28d6bf1e60b3f37db6fe7fead:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dgit
 * [new ref]         66c68f7ce552dae28d6bf1e60b3f37db6fe7fead -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 66c68f7 Update to 16.7 upstream release