$ git clone -n https://src.fedoraproject.org/rpms/mesa-demos.git /var/lib/mock/f40-build-788451-135159/root/chroot_tmpdir/scmroot/mesa-demos
Cloning into '/var/lib/mock/f40-build-788451-135159/root/chroot_tmpdir/scmroot/mesa-demos'...
$ git fetch origin afa18219cb46d2e9f958a5c90d0f27f98e8cf397:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mesa-demos
 * [new ref]         afa18219cb46d2e9f958a5c90d0f27f98e8cf397 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at afa1821 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild