$ git clone -n https://src.fedoraproject.org/rpms/ghc-logging-facade.git /var/lib/mock/f39-build-1980325-43341/root/chroot_tmpdir/scmroot/ghc-logging-facade
Cloning into '/var/lib/mock/f39-build-1980325-43341/root/chroot_tmpdir/scmroot/ghc-logging-facade'...
$ git fetch origin 6810c748e623e7b63ab1b3e0d38f9d332dc5dd47:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-logging-facade
 * [new ref]         6810c748e623e7b63ab1b3e0d38f9d332dc5dd47 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6810c74 bump release