$ git clone -n https://github.com/xcp-ng-rpms/xen.git /var/lib/mock/almalinux-10.0-11122-29535/root/chroot_tmpdir/scmroot/xen
Cloning into '/var/lib/mock/almalinux-10.0-11122-29535/root/chroot_tmpdir/scmroot/xen'...
$ git fetch origin b90932ded5a9e02128f1f008f7771952e729a1ee:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xen
 * [new ref]         b90932ded5a9e02128f1f008f7771952e729a1ee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b90932d bump release for test build