$ git clone -n https://src.fedoraproject.org/rpms/mold.git /var/lib/mock/f40-build-788629-135293/root/chroot_tmpdir/scmroot/mold
Cloning into '/var/lib/mock/f40-build-788629-135293/root/chroot_tmpdir/scmroot/mold'...
$ git fetch origin d087a36ef95d37465247c27502c2ae1e25f1dda1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mold
 * [new ref]         d087a36ef95d37465247c27502c2ae1e25f1dda1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d087a36 Bump version to 2.4.1