$ git clone -n https://src.fedoraproject.org/rpms/ghc-gi-gdk.git /var/lib/mock/f38-build-side-42-init-devel-846997-28422/root/chroot_tmpdir/scmroot/ghc-gi-gdk
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-846997-28422/root/chroot_tmpdir/scmroot/ghc-gi-gdk'...
$ git fetch origin 2fba70618f56f663e1fe53200954ea4111e3eb08:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-gi-gdk
 * [new ref]         2fba70618f56f663e1fe53200954ea4111e3eb08 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2fba706 Convert to %autorelease and %autochangelog