$ git clone -n https://gitee.com/fundawang/webkitgtk.git /var/lib/mock/dist-an23-build-319713-67868/root/chroot_tmpdir/scmroot/webkitgtk
Cloning into '/var/lib/mock/dist-an23-build-319713-67868/root/chroot_tmpdir/scmroot/webkitgtk'...
$ git fetch origin 63dde64c880e243c89d486698b622f863fd81153:KOJI_FETCH_HEAD
From https://gitee.com/fundawang/webkitgtk
 * [new ref]         63dde64c880e243c89d486698b622f863fd81153 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 63dde64 reduce memory usage