$ git clone -n https://src.fedoraproject.org/rpms/libgda5.git /var/lib/mock/f40-build-2096613-50410/root/chroot_tmpdir/scmroot/libgda5
Cloning into '/var/lib/mock/f40-build-2096613-50410/root/chroot_tmpdir/scmroot/libgda5'...
$ git fetch origin 904cff1701ed146260865ce655939e6c2d12578d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libgda5
 * [new ref]         904cff1701ed146260865ce655939e6c2d12578d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 904cff1 Further C compatibility fixes