$ git clone -n https://src.fedoraproject.org/rpms/rust-twoway.git /var/lib/mock/f42-build-3251781-41222/root/chroot_tmpdir/scmroot/rust-twoway
Cloning into '/var/lib/mock/f42-build-3251781-41222/root/chroot_tmpdir/scmroot/rust-twoway'...
$ git fetch origin 61d54ae8cc70896fe347dbf205c5b1b4ab86be73:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-twoway
 * [new ref]         61d54ae8cc70896fe347dbf205c5b1b4ab86be73 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 61d54ae unused leaf package for more than two release cycles