$ git clone -n https://src.fedoraproject.org/rpms/0ad.git /var/lib/mock/f38-build-727212-100583/root/chroot_tmpdir/scmroot/0ad
Cloning into '/var/lib/mock/f38-build-727212-100583/root/chroot_tmpdir/scmroot/0ad'...
$ git fetch origin ffb9defa20000df331743a89ea80793709c813c8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/0ad
 * [new ref]         ffb9defa20000df331743a89ea80793709c813c8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ffb9def Unset RUSTFLAGS to work around mozjs not supporting taking more than one flag