$ git clone -n https://src.fedoraproject.org/rpms/clang.git /var/lib/mock/f41-build-756058-13417/root/chroot_tmpdir/scmroot/clang
Cloning into '/var/lib/mock/f41-build-756058-13417/root/chroot_tmpdir/scmroot/clang'...
$ git fetch origin f420b0a94c9c61ef7c909408b9dd005c140914bf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/clang
 * [new ref]         f420b0a94c9c61ef7c909408b9dd005c140914bf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f420b0a Gating config to test kernel-ark rebuild