$ git clone -n https://src.fedoraproject.org/rpms/nxtrc.git /var/lib/mock/f39-build-1464457-33501/root/chroot_tmpdir/scmroot/nxtrc
Cloning into '/var/lib/mock/f39-build-1464457-33501/root/chroot_tmpdir/scmroot/nxtrc'...
$ git fetch origin 7045c77fffe121f35c9d9ca42fdb769a2e54fbbf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nxtrc
 * [new ref]         7045c77fffe121f35c9d9ca42fdb769a2e54fbbf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7045c77 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild