$ git clone -n https://src.fedoraproject.org/rpms/ghc-either.git /var/lib/mock/f39-build-1715382-41229/root/chroot_tmpdir/scmroot/ghc-either
Cloning into '/var/lib/mock/f39-build-1715382-41229/root/chroot_tmpdir/scmroot/ghc-either'...
$ git fetch origin 1047dd936566107e9ba58268d413541615601430:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-either
 * [new ref]         1047dd936566107e9ba58268d413541615601430 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1047dd9 bump release