$ git clone -n https://src.fedoraproject.org/rpms/ghc-libmpd.git /var/lib/mock/f38-build-side-42-init-devel-698991-27042/root/chroot_tmpdir/scmroot/ghc-libmpd
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-698991-27042/root/chroot_tmpdir/scmroot/ghc-libmpd'...
$ git fetch origin 6e8b8418d5d77bff832d240c45a835249c5cec01:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-libmpd
 * [new ref]         6e8b8418d5d77bff832d240c45a835249c5cec01 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e8b841 Convert to %autorelease and %autochangelog