$ git clone -n https://src.fedoraproject.org/rpms/avr-gcc.git /var/lib/mock/f39-build-1599443-38515/root/chroot_tmpdir/scmroot/avr-gcc
Cloning into '/var/lib/mock/f39-build-1599443-38515/root/chroot_tmpdir/scmroot/avr-gcc'...
$ git fetch origin 14d7e3b2e34be50290e795d645dd2b73ea1b9558:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/avr-gcc
 * [new ref]         14d7e3b2e34be50290e795d645dd2b73ea1b9558 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 14d7e3b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild