$ git clone -n https://src.fedoraproject.org/rpms/avr-gcc.git /var/lib/mock/f40-build-805566-144813/root/chroot_tmpdir/scmroot/avr-gcc
Cloning into '/var/lib/mock/f40-build-805566-144813/root/chroot_tmpdir/scmroot/avr-gcc'...
$ git fetch origin 691d521c82ab5df990c24870a92b8b6812bf43ec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/avr-gcc
 * [new ref]         691d521c82ab5df990c24870a92b8b6812bf43ec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 691d521 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild