$ git clone -n https://gitee.com/xuchun-shang/kmod-udma.git /var/lib/mock/dist-an23-build-329411-69372/root/chroot_tmpdir/scmroot/kmod-udma
Cloning into '/var/lib/mock/dist-an23-build-329411-69372/root/chroot_tmpdir/scmroot/kmod-udma'...
$ git fetch origin b5e29afb28f7196c62b67e4a774313d4d97fe13c:KOJI_FETCH_HEAD
From https://gitee.com/xuchun-shang/kmod-udma
 * [new ref]         b5e29afb28f7196c62b67e4a774313d4d97fe13c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b5e29af Update spec for weak module