$ git clone -n https://src.fedoraproject.org/rpms/plexus-compiler.git /var/lib/mock/f40-build-2180582-51174/root/chroot_tmpdir/scmroot/plexus-compiler
Cloning into '/var/lib/mock/f40-build-2180582-51174/root/chroot_tmpdir/scmroot/plexus-compiler'...
$ git fetch origin 9c00c79cfad41eb985f2fb84944cd237a3d19e2c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plexus-compiler
 * [new ref]         9c00c79cfad41eb985f2fb84944cd237a3d19e2c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9c00c79 Update to upstream version 2.14.1