$ git clone -n https://src.fedoraproject.org/rpms/cube.git /var/lib/mock/f42-build-3421856-45166/root/chroot_tmpdir/scmroot/cube
Cloning into '/var/lib/mock/f42-build-3421856-45166/root/chroot_tmpdir/scmroot/cube'...
$ git fetch origin 6a260f5e7ceb8ff16f4413447f6c4e0927d04ea4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cube
 * [new ref]         6a260f5e7ceb8ff16f4413447f6c4e0927d04ea4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a260f5 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild