$ git clone -n https://src.fedoraproject.org/rpms/jakarta-mail.git /var/lib/mock/f41-build-1049336-19179/root/chroot_tmpdir/scmroot/jakarta-mail
Cloning into '/var/lib/mock/f41-build-1049336-19179/root/chroot_tmpdir/scmroot/jakarta-mail'...
$ git fetch origin 9829347d337a6f7128b639420a7ae41054cc140d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jakarta-mail
 * [new ref]         9829347d337a6f7128b639420a7ae41054cc140d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9829347 Rebuilt for java-21-openjdk as system jdk