$ git clone -n https://src.fedoraproject.org/rpms/nautilus.git /var/lib/mock/f42-build-side-1-3499026-45964/root/chroot_tmpdir/scmroot/nautilus
Cloning into '/var/lib/mock/f42-build-side-1-3499026-45964/root/chroot_tmpdir/scmroot/nautilus'...
$ git fetch origin 711adbded52f4f6e4e798748f2be893b517c0fe4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nautilus
 * [new ref]         711adbded52f4f6e4e798748f2be893b517c0fe4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 711adbd Update to 48.1