$ git clone -n https://src.fedoraproject.org/rpms/mold.git /var/lib/mock/f39-build-1566653-37590/root/chroot_tmpdir/scmroot/mold
Cloning into '/var/lib/mock/f39-build-1566653-37590/root/chroot_tmpdir/scmroot/mold'...
$ git fetch origin ac62063c8ca838caa6fc7c81146b6c107bd95fc0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mold
 * [new ref]         ac62063c8ca838caa6fc7c81146b6c107bd95fc0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ac62063 Bump version to 2.1.0