$ git clone -n https://src.fedoraproject.org/rpms/hotspot.git /var/lib/mock/f42-build-3532517-46326/root/chroot_tmpdir/scmroot/hotspot
Cloning into '/var/lib/mock/f42-build-3532517-46326/root/chroot_tmpdir/scmroot/hotspot'...
$ git fetch origin 9ce90dd90722edbb182ade2e7e9bd0a6ffb68902:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hotspot
 * [new ref]         9ce90dd90722edbb182ade2e7e9bd0a6ffb68902 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9ce90dd Support Rust symbol demangling