$ git clone -n https://src.fedoraproject.org/rpms/exec-maven-plugin.git /var/lib/mock/f41-build-749656-13378/root/chroot_tmpdir/scmroot/exec-maven-plugin
Cloning into '/var/lib/mock/f41-build-749656-13378/root/chroot_tmpdir/scmroot/exec-maven-plugin'...
$ git fetch origin d4e5e97f30e88c45559920409507af8d469cc0f2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/exec-maven-plugin
 * [new ref]         d4e5e97f30e88c45559920409507af8d469cc0f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d4e5e97 Bump to 3.3.0