$ git clone -n https://src.fedoraproject.org/rpms/rubygem-net-irc.git /var/lib/mock/f40-build-2323113-58698/root/chroot_tmpdir/scmroot/rubygem-net-irc
Cloning into '/var/lib/mock/f40-build-2323113-58698/root/chroot_tmpdir/scmroot/rubygem-net-irc'...
$ git fetch origin c623010447a3c6b8f7b59e5284cfd05af34a3cea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-net-irc
 * [new ref]         c623010447a3c6b8f7b59e5284cfd05af34a3cea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c623010 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild