$ git clone -n https://src.fedoraproject.org/rpms/rust-scx_rustland.git /var/lib/mock/f40-build-781183-131444/root/chroot_tmpdir/scmroot/rust-scx_rustland
Cloning into '/var/lib/mock/f40-build-781183-131444/root/chroot_tmpdir/scmroot/rust-scx_rustland'...
$ git fetch origin 6a611f6448672c77ff524c61df3b12f06dff0147:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-scx_rustland
 * [new ref]         6a611f6448672c77ff524c61df3b12f06dff0147 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a611f6 Update to 0.0.3