$ git clone -n https://src.fedoraproject.org/rpms/exec-maven-plugin.git /var/lib/mock/f40-build-2430110-60607/root/chroot_tmpdir/scmroot/exec-maven-plugin
Cloning into '/var/lib/mock/f40-build-2430110-60607/root/chroot_tmpdir/scmroot/exec-maven-plugin'...
$ git fetch origin 66c2cec0f629f1c3f901334e268d82747fa413b3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/exec-maven-plugin
 * [new ref]         66c2cec0f629f1c3f901334e268d82747fa413b3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 66c2cec Add junit dependency