$ git clone -n https://src.fedoraproject.org/rpms/nas.git /var/lib/mock/f38-build-side-42-init-devel-785294-27956/root/chroot_tmpdir/scmroot/nas
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-785294-27956/root/chroot_tmpdir/scmroot/nas'...
$ git fetch origin 52fa8e5e066242db7b614ad1d1e81ef020ceacb3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nas
 * [new ref]         52fa8e5e066242db7b614ad1d1e81ef020ceacb3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 52fa8e5 Respect linker flags when linking shared libraries