$ git clone -n https://src.fedoraproject.org/rpms/gtkd.git /var/lib/mock/f41-build-851472-165974/root/chroot_tmpdir/scmroot/gtkd
Cloning into '/var/lib/mock/f41-build-851472-165974/root/chroot_tmpdir/scmroot/gtkd'...
$ git fetch origin 4f3f2a02241fa5cde8874e846f6df1d068210a03:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gtkd
 * [new ref]         4f3f2a02241fa5cde8874e846f6df1d068210a03 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4f3f2a0 Rebuilt for ldc 1.39