$ git clone -n https://github.com/xcp-ng-rpms/ipxe /var/lib/mock/v9.0-incoming-11322-29648/root/chroot_tmpdir/scmroot/ipxe
Cloning into '/var/lib/mock/v9.0-incoming-11322-29648/root/chroot_tmpdir/scmroot/ipxe'...
$ git fetch origin b02c847c661e3f541bc683e4e7816ccdabcc1078:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/ipxe
 * [new ref]         b02c847c661e3f541bc683e4e7816ccdabcc1078 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b02c847 Set team owner