$ git clone -n https://src.fedoraproject.org/rpms/auto-buildrequires.git /var/lib/mock/f40-build-794768-139786/root/chroot_tmpdir/scmroot/auto-buildrequires
Cloning into '/var/lib/mock/f40-build-794768-139786/root/chroot_tmpdir/scmroot/auto-buildrequires'...
$ git fetch origin 55d4bf64bb68c070c36c1fec2bff5ddfd2eaffc2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/auto-buildrequires
 * [new ref]         55d4bf64bb68c070c36c1fec2bff5ddfd2eaffc2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 55d4bf6 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild