$ git clone -n https://src.fedoraproject.org/rpms/v8-314.git /var/lib/mock/f39-build-2444441-61041/root/chroot_tmpdir/scmroot/v8-314
Cloning into '/var/lib/mock/f39-build-2444441-61041/root/chroot_tmpdir/scmroot/v8-314'...
$ git fetch origin bf437b9f58da8ba9318c4e63d62f406f8e43ce08:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/v8-314
 * [new ref]         bf437b9f58da8ba9318c4e63d62f406f8e43ce08 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bf437b9 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild