$ git clone -n https://src.fedoraproject.org/rpms/mojo-executor.git /var/lib/mock/f40-build-1804503-24879/root/chroot_tmpdir/scmroot/mojo-executor
Cloning into '/var/lib/mock/f40-build-1804503-24879/root/chroot_tmpdir/scmroot/mojo-executor'...
$ git fetch origin 518ff54d6f6e145fb406f7c42ba411869829bd44:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mojo-executor
 * [new ref]         518ff54d6f6e145fb406f7c42ba411869829bd44 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 518ff54 Rebuilt for java-21-openjdk as system jdk