$ git clone -n https://src.fedoraproject.org/rpms/string-template-maven-plugin.git /var/lib/mock/f40-build-2440472-60984/root/chroot_tmpdir/scmroot/string-template-maven-plugin
Cloning into '/var/lib/mock/f40-build-2440472-60984/root/chroot_tmpdir/scmroot/string-template-maven-plugin'...
$ git fetch origin d2de0e30790d6e2ddde0f57f85f2572e2ad23498:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/string-template-maven-plugin
 * [new ref]         d2de0e30790d6e2ddde0f57f85f2572e2ad23498 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2de0e3 Add descriptor patch to fix FTBFS