$ git clone -n https://src.fedoraproject.org/rpms/ghc-equivalence.git /var/lib/mock/f39-build-1983951-43346/root/chroot_tmpdir/scmroot/ghc-equivalence
Cloning into '/var/lib/mock/f39-build-1983951-43346/root/chroot_tmpdir/scmroot/ghc-equivalence'...
$ git fetch origin e4b91e15cc815ed26a079dc85a417c1c4f703d7b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-equivalence
 * [new ref]         e4b91e15cc815ed26a079dc85a417c1c4f703d7b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e4b91e1 bump release