$ git clone -n https://src.fedoraproject.org/rpms/java-latest-openjdk-portable.git /var/lib/mock/f41-build-side-1-3126972-39530/root/chroot_tmpdir/scmroot/java-latest-openjdk-portable
Cloning into '/var/lib/mock/f41-build-side-1-3126972-39530/root/chroot_tmpdir/scmroot/java-latest-openjdk-portable'...
$ git fetch origin 552d7c1901352d022ac57c71771cf1cd7baa8933:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/java-latest-openjdk-portable
 * [new ref]         552d7c1901352d022ac57c71771cf1cd7baa8933 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 552d7c1 October CPU