$ git clone -n https://src.fedoraproject.org/rpms/wasi-libc.git /var/lib/mock/f40-build-2225238-52810/root/chroot_tmpdir/scmroot/wasi-libc
Cloning into '/var/lib/mock/f40-build-2225238-52810/root/chroot_tmpdir/scmroot/wasi-libc'...
$ git fetch origin 90b494294cd0b5a2c81cc8e7502fde7dee8f03e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wasi-libc
 * [new ref]         90b494294cd0b5a2c81cc8e7502fde7dee8f03e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 90b4942 Expand README