$ git clone -n https://src.fedoraproject.org/rpms/gdl.git /var/lib/mock/f40-build-1932215-25124/root/chroot_tmpdir/scmroot/gdl
Cloning into '/var/lib/mock/f40-build-1932215-25124/root/chroot_tmpdir/scmroot/gdl'...
$ git fetch origin 2503ab2f71220764d6e80965cf846c67cbc634a7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gdl
 * [new ref]         2503ab2f71220764d6e80965cf846c67cbc634a7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2503ab2 Merge branch 'rawhide' into f40