$ git clone -n https://gitee.com/pkm031/systemd.git /var/lib/mock/dist-an23-build-474256-74190/root/chroot_tmpdir/scmroot/systemd
Cloning into '/var/lib/mock/dist-an23-build-474256-74190/root/chroot_tmpdir/scmroot/systemd'...
$ git fetch origin 8161d2636e9208ff6e35d1d39859094b5560912c:KOJI_FETCH_HEAD
From https://gitee.com/pkm031/systemd
 * [new ref]         8161d2636e9208ff6e35d1d39859094b5560912c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8161d26 print-backtrack-log-to-var-log-messages