$ git clone -n https://src.fedoraproject.org/rpms/ghc-GLURaw.git /var/lib/mock/f41-build-838877-159867/root/chroot_tmpdir/scmroot/ghc-GLURaw
Cloning into '/var/lib/mock/f41-build-838877-159867/root/chroot_tmpdir/scmroot/ghc-GLURaw'...
$ git fetch origin 7ab87514299023ea06798f7c0acb30f33548fc1e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-GLURaw
 * [new ref]         7ab87514299023ea06798f7c0acb30f33548fc1e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7ab8751 bump release