$ git clone -n https://src.fedoraproject.org/rpms/deepin-file-manager.git /var/lib/mock/f42-build-3528319-46309/root/chroot_tmpdir/scmroot/deepin-file-manager
Cloning into '/var/lib/mock/f42-build-3528319-46309/root/chroot_tmpdir/scmroot/deepin-file-manager'...
$ git fetch origin 1a8e40c905c95abc24588ff4ceb94e9356dad2cc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/deepin-file-manager
 * [new ref]         1a8e40c905c95abc24588ff4ceb94e9356dad2cc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1a8e40c Fix build