$ git clone -n https://gitee.com/zhangwenlong01/gtkmm30.git /var/lib/mock/dist-an23-build-515942-75165/root/chroot_tmpdir/scmroot/gtkmm30
Cloning into '/var/lib/mock/dist-an23-build-515942-75165/root/chroot_tmpdir/scmroot/gtkmm30'...
$ git fetch origin 996d8b62214cdf7b5bb81e738f56fd6f61da4996:KOJI_FETCH_HEAD
From https://gitee.com/zhangwenlong01/gtkmm30
 * [new ref]         996d8b62214cdf7b5bb81e738f56fd6f61da4996 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 996d8b6 rebuild for loongarch64