$ git clone -n https://src.fedoraproject.org/rpms/rust-triomphe.git /var/lib/mock/f40-build-2234316-53396/root/chroot_tmpdir/scmroot/rust-triomphe
Cloning into '/var/lib/mock/f40-build-2234316-53396/root/chroot_tmpdir/scmroot/rust-triomphe'...
$ git fetch origin 535d88a1490aba81e688646ab9fdf4a2cac23c02:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-triomphe
 * [new ref]         535d88a1490aba81e688646ab9fdf4a2cac23c02 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 535d88a Update to 0.1.11 (fedora#2252084)