$ git clone -n https://src.fedoraproject.org/rpms/golang-github-cockroachdb-cmux.git /var/lib/mock/f41-build-side-1-2638647-26443/root/chroot_tmpdir/scmroot/golang-github-cockroachdb-cmux
Cloning into '/var/lib/mock/f41-build-side-1-2638647-26443/root/chroot_tmpdir/scmroot/golang-github-cockroachdb-cmux'...
$ git fetch origin 1f7ff8c99206e51b799773f060f2296ba648ac63:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-cockroachdb-cmux
 * [new ref]         1f7ff8c99206e51b799773f060f2296ba648ac63 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f7ff8c convert ASL 2.0 license to SPDX