$ git clone -n https://src.fedoraproject.org/rpms/xcalc.git /var/lib/mock/f40-build-788521-135185/root/chroot_tmpdir/scmroot/xcalc
Cloning into '/var/lib/mock/f40-build-788521-135185/root/chroot_tmpdir/scmroot/xcalc'...
$ git fetch origin f179d6ff36fb75034fad369d6acd023c721ff0f8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xcalc
 * [new ref]         f179d6ff36fb75034fad369d6acd023c721ff0f8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f179d6f Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild