$ git clone -n https://src.fedoraproject.org/rpms/ghc-safe.git /var/lib/mock/f40-build-742320-110720/root/chroot_tmpdir/scmroot/ghc-safe
Cloning into '/var/lib/mock/f40-build-742320-110720/root/chroot_tmpdir/scmroot/ghc-safe'...
$ git fetch origin 04112d66b3aece20045143da928c8b2513d21155:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-safe
 * [new ref]         04112d66b3aece20045143da928c8b2513d21155 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 04112d6 bump release