$ git clone -n https://src.fedoraproject.org/rpms/ghc-utf8-light.git /var/lib/mock/f39-build-1712647-41228/root/chroot_tmpdir/scmroot/ghc-utf8-light
Cloning into '/var/lib/mock/f39-build-1712647-41228/root/chroot_tmpdir/scmroot/ghc-utf8-light'...
$ git fetch origin 9d83941d5de57a41cafb3b8306d1944f2f5eec9a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-utf8-light
 * [new ref]         9d83941d5de57a41cafb3b8306d1944f2f5eec9a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9d83941 bump release