$ git clone -n https://src.fedoraproject.org/rpms/kf6-kcontacts.git /var/lib/mock/f40-build-2276567-55167/root/chroot_tmpdir/scmroot/kf6-kcontacts
Cloning into '/var/lib/mock/f40-build-2276567-55167/root/chroot_tmpdir/scmroot/kf6-kcontacts'...
$ git fetch origin 56ebb36ed200946f5d5c74b7ac3b1fccf3771a11:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kcontacts
 * [new ref]         56ebb36ed200946f5d5c74b7ac3b1fccf3771a11 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 56ebb36 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild