$ git clone -n https://src.fedoraproject.org/rpms/diffuse.git /var/lib/mock/f39-build-1518499-35811/root/chroot_tmpdir/scmroot/diffuse
Cloning into '/var/lib/mock/f39-build-1518499-35811/root/chroot_tmpdir/scmroot/diffuse'...
$ git fetch origin 22712e88c0d8dc9bf7e29172430b1094b14ac1ed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/diffuse
 * [new ref]         22712e88c0d8dc9bf7e29172430b1094b14ac1ed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 22712e8 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild