$ git clone -n https://src.fedoraproject.org/rpms/mysql-connector-java.git /var/lib/mock/f38-build-side-42-init-devel-1157936-30554/root/chroot_tmpdir/scmroot/mysql-connector-java
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1157936-30554/root/chroot_tmpdir/scmroot/mysql-connector-java'...
$ git fetch origin db8e78d4c9b5620c1ec8f4956e1976dca55775ea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mysql-connector-java
 * [new ref]         db8e78d4c9b5620c1ec8f4956e1976dca55775ea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at db8e78d Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild