$ git clone -n https://src.fedoraproject.org/rpms/signon.git /var/lib/mock/f39-build-1470190-33883/root/chroot_tmpdir/scmroot/signon
Cloning into '/var/lib/mock/f39-build-1470190-33883/root/chroot_tmpdir/scmroot/signon'...
$ git fetch origin 4b6b7e99c09ef86305a9a0ea8fbe60e901d369f6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/signon
 * [new ref]         4b6b7e99c09ef86305a9a0ea8fbe60e901d369f6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b6b7e9 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild