$ git clone -n https://src.fedoraproject.org/rpms/libfixposix.git /var/lib/mock/f40-build-785436-133953/root/chroot_tmpdir/scmroot/libfixposix
Cloning into '/var/lib/mock/f40-build-785436-133953/root/chroot_tmpdir/scmroot/libfixposix'...
$ git fetch origin a6f983c9eb97961e45e45068f2a9ad50fb9b6162:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libfixposix
 * [new ref]         a6f983c9eb97961e45e45068f2a9ad50fb9b6162 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a6f983c Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild