$ git clone -n https://src.fedoraproject.org/rpms/php-tecnickcom-tc-lib-barcode.git /var/lib/mock/f40-build-2266434-54657/root/chroot_tmpdir/scmroot/php-tecnickcom-tc-lib-barcode
Cloning into '/var/lib/mock/f40-build-2266434-54657/root/chroot_tmpdir/scmroot/php-tecnickcom-tc-lib-barcode'...
$ git fetch origin b7871e9a966e2ffd03bfe7b1e700a98bdd8132f0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-tecnickcom-tc-lib-barcode
 * [new ref]         b7871e9a966e2ffd03bfe7b1e700a98bdd8132f0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b7871e9 update to 2.1.2 (no change)