$ git clone -n https://src.fedoraproject.org/rpms/ghc-gtk3.git /var/lib/mock/f38-build-side-42-init-devel-682343-26743/root/chroot_tmpdir/scmroot/ghc-gtk3
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-682343-26743/root/chroot_tmpdir/scmroot/ghc-gtk3'...
$ git fetch origin b11a43cc1c1eeab089d663bc0a64788e2a367607:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-gtk3
 * [new ref]         b11a43cc1c1eeab089d663bc0a64788e2a367607 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b11a43c Convert to %autorelease and %autochangelog