$ git clone -n https://gitee.com/mgb01105731/gcc-toolset-15.git /var/lib/mock/dist-an23-build-530723-80513/root/chroot_tmpdir/scmroot/gcc-toolset-15
Cloning into '/var/lib/mock/dist-an23-build-530723-80513/root/chroot_tmpdir/scmroot/gcc-toolset-15'...
$ git fetch origin e8c09bf4a5c614076f83a602686284e3b3fefa85:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/gcc-toolset-15
 * [new ref]         e8c09bf4a5c614076f83a602686284e3b3fefa85 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e8c09bf init