$ git clone -n https://src.fedoraproject.org/rpms/ghc-charset.git /var/lib/mock/f38-build-side-42-init-devel-971163-28813/root/chroot_tmpdir/scmroot/ghc-charset
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-971163-28813/root/chroot_tmpdir/scmroot/ghc-charset'...
$ git fetch origin d932ad59c4c0ca8469385f2b60ef7b820253c332:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-charset
 * [new ref]         d932ad59c4c0ca8469385f2b60ef7b820253c332 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d932ad5 set %autorelease baserelease over f37