$ git clone -n https://src.fedoraproject.org/rpms/ghc-microlens-mtl.git /var/lib/mock/f38-build-side-42-init-devel-750242-27661/root/chroot_tmpdir/scmroot/ghc-microlens-mtl
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-750242-27661/root/chroot_tmpdir/scmroot/ghc-microlens-mtl'...
$ git fetch origin c99f3b54193ffd080fe93cecb9d943c822722dcf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-microlens-mtl
 * [new ref]         c99f3b54193ffd080fe93cecb9d943c822722dcf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c99f3b5 Convert to %autorelease and %autochangelog