$ git clone -n https://gitee.com/mgb01105731/jakarta-activation_2.git /var/lib/mock/dist-an23-build-329678-69372/root/chroot_tmpdir/scmroot/jakarta-activation_2
Cloning into '/var/lib/mock/dist-an23-build-329678-69372/root/chroot_tmpdir/scmroot/jakarta-activation_2'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/jakarta-activation_2
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 07adab3 update to version 2.1.2