$ git clone -n https://src.fedoraproject.org/rpms/ghc-fmt.git /var/lib/mock/f39-build-1712679-41228/root/chroot_tmpdir/scmroot/ghc-fmt
Cloning into '/var/lib/mock/f39-build-1712679-41228/root/chroot_tmpdir/scmroot/ghc-fmt'...
$ git fetch origin a56981871d6d2c5805d3fcdee51ff716ac4f5244:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-fmt
 * [new ref]         a56981871d6d2c5805d3fcdee51ff716ac4f5244 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a569818 bump release