$ git clone -n https://src.fedoraproject.org/rpms/koji-containerbuild.git /var/lib/mock/f41-build-side-1-2643784-26944/root/chroot_tmpdir/scmroot/koji-containerbuild
Cloning into '/var/lib/mock/f41-build-side-1-2643784-26944/root/chroot_tmpdir/scmroot/koji-containerbuild'...
$ git fetch origin ea26fed6727037e04c643306e1543e5bd6fdd17b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/koji-containerbuild
 * [new ref]         ea26fed6727037e04c643306e1543e5bd6fdd17b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea26fed convert license to SPDX