$ git clone -n https://src.fedoraproject.org/rpms/kasts.git /var/lib/mock/f41-build-side-114559-60918734-6585810/root/chroot_tmpdir/scmroot/kasts
Cloning into '/var/lib/mock/f41-build-side-114559-60918734-6585810/root/chroot_tmpdir/scmroot/kasts'...
$ git fetch origin d0725df2550a02136f3b71b4083c3b0ba1684321:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kasts
 * [new ref]         d0725df2550a02136f3b71b4083c3b0ba1684321 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d0725df Merge branch 'rawhide' into f41