$ git clone -n https://src.fedoraproject.org/rpms/astrometry-tycho2.git /var/lib/mock/f40-build-2560571-62123/root/chroot_tmpdir/scmroot/astrometry-tycho2
Cloning into '/var/lib/mock/f40-build-2560571-62123/root/chroot_tmpdir/scmroot/astrometry-tycho2'...
$ git fetch origin 491172845bb22dec5085cbdf0e1b2630ae6a9baa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/astrometry-tycho2
 * [new ref]         491172845bb22dec5085cbdf0e1b2630ae6a9baa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4911728 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild