$ git clone -n https://src.fedoraproject.org/rpms/avr-libc.git /var/lib/mock/f40-build-2335416-59375/root/chroot_tmpdir/scmroot/avr-libc
Cloning into '/var/lib/mock/f40-build-2335416-59375/root/chroot_tmpdir/scmroot/avr-libc'...
$ git fetch origin 6be8c17d7242017ecea1338b2ac562ffd54e2568:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/avr-libc
 * [new ref]         6be8c17d7242017ecea1338b2ac562ffd54e2568 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6be8c17 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild