$ git clone -n https://src.fedoraproject.org/rpms/rubygem-cookiejar.git /var/lib/mock/f40-build-732422-13186/root/chroot_tmpdir/scmroot/rubygem-cookiejar
Cloning into '/var/lib/mock/f40-build-732422-13186/root/chroot_tmpdir/scmroot/rubygem-cookiejar'...
$ git fetch origin ed9814f58d4554cd92a8ee9a23842b7673774a81:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-cookiejar
 * [new ref]         ed9814f58d4554cd92a8ee9a23842b7673774a81 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ed9814f Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild