$ git clone -n https://src.fedoraproject.org/rpms/gv.git /var/lib/mock/f42-build-side-1-3586049-46913/root/chroot_tmpdir/scmroot/gv
Cloning into '/var/lib/mock/f42-build-side-1-3586049-46913/root/chroot_tmpdir/scmroot/gv'...
$ git fetch origin 8b6a929b86ca3423c67036f9c23b70cc10b9d7d7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gv
 * [new ref]         8b6a929b86ca3423c67036f9c23b70cc10b9d7d7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8b6a929 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild