$ git clone -n https://src.fedoraproject.org/rpms/mozilla-fira-fonts.git /var/lib/mock/f39-build-1779592-41542/root/chroot_tmpdir/scmroot/mozilla-fira-fonts
Cloning into '/var/lib/mock/f39-build-1779592-41542/root/chroot_tmpdir/scmroot/mozilla-fira-fonts'...
$ git fetch origin 981c84a1722ba0fffa3b04c180948f27459eaa0c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mozilla-fira-fonts
 * [new ref]         981c84a1722ba0fffa3b04c180948f27459eaa0c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 981c84a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild