$ git clone -n https://gitee.com/sys0613/perl-Carp.git /var/lib/mock/dist-an23-build-309082-67129/root/chroot_tmpdir/scmroot/perl-Carp
Cloning into '/var/lib/mock/dist-an23-build-309082-67129/root/chroot_tmpdir/scmroot/perl-Carp'...
$ git fetch origin b81e9d02aa9c4baf51c652289e3ebab5cdd54d75:KOJI_FETCH_HEAD
From https://gitee.com/sys0613/perl-Carp
 * [new ref]         b81e9d02aa9c4baf51c652289e3ebab5cdd54d75 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b81e9d0 spec: add sub doc package