$ git clone -n https://src.fedoraproject.org/rpms/rubygem-serialport.git /var/lib/mock/f40-build-2034347-47885/root/chroot_tmpdir/scmroot/rubygem-serialport
Cloning into '/var/lib/mock/f40-build-2034347-47885/root/chroot_tmpdir/scmroot/rubygem-serialport'...
$ git fetch origin aeb7728ecf701b78300ea509f59c061f7356f757:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-serialport
 * [new ref]         aeb7728ecf701b78300ea509f59c061f7356f757 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aeb7728 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild