$ git clone -n https://src.fedoraproject.org/rpms/krfb.git /var/lib/mock/f40-build-2210646-52181/root/chroot_tmpdir/scmroot/krfb
Cloning into '/var/lib/mock/f40-build-2210646-52181/root/chroot_tmpdir/scmroot/krfb'...
$ git fetch origin c6ca7da4745fafc76317cadba5b5cd3d12385294:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/krfb
 * [new ref]         c6ca7da4745fafc76317cadba5b5cd3d12385294 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c6ca7da Build against the kpipewire5 compat package