$ git clone -n https://src.fedoraproject.org/rpms/jstest-gtk.git /var/lib/mock/f40-build-800550-143605/root/chroot_tmpdir/scmroot/jstest-gtk
Cloning into '/var/lib/mock/f40-build-800550-143605/root/chroot_tmpdir/scmroot/jstest-gtk'...
$ git fetch origin a13f52c460e9a5f256632bd47a4269423ec944cb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jstest-gtk
 * [new ref]         a13f52c460e9a5f256632bd47a4269423ec944cb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a13f52c Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild