$ git clone -n https://src.fedoraproject.org/rpms/plexus-components-pom.git /var/lib/mock/f41-build-side-1-3105491-39372/root/chroot_tmpdir/scmroot/plexus-components-pom
Cloning into '/var/lib/mock/f41-build-side-1-3105491-39372/root/chroot_tmpdir/scmroot/plexus-components-pom'...
$ git fetch origin 409ae23f11efcb3803f233a7b4e484e9d99d862d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plexus-components-pom
 * [new ref]         409ae23f11efcb3803f233a7b4e484e9d99d862d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 409ae23 Switch javapackages tests to f41 branch