$ git clone -n https://src.fedoraproject.org/rpms/samurai.git /var/lib/mock/f45-build-35597-696/root/chroot_tmpdir/scmroot/samurai
Cloning into '/var/lib/mock/f45-build-35597-696/root/chroot_tmpdir/scmroot/samurai'...
$ git fetch origin a423991abe2b799e0f53cbaa347b4f5f617dd831:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/samurai
 * [new ref]         a423991abe2b799e0f53cbaa347b4f5f617dd831 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a423991 drop ix86 support