$ git clone -n https://src.fedoraproject.org/rpms/nfs-utils.git /var/lib/mock/f38-build-719910-97320/root/chroot_tmpdir/scmroot/nfs-utils
Cloning into '/var/lib/mock/f38-build-719910-97320/root/chroot_tmpdir/scmroot/nfs-utils'...
$ git fetch origin dff02859ecc42a95b0403a3d7945de03abe9f34f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nfs-utils
 * [new ref]         dff02859ecc42a95b0403a3d7945de03abe9f34f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dff0285 Updated to the latest release: nfs-utils-2-6-3 (bz 2188038)