$ git clone -n https://src.fedoraproject.org/rpms/jakarta-servlet.git /var/lib/mock/f40-build-1466353-23686/root/chroot_tmpdir/scmroot/jakarta-servlet
Cloning into '/var/lib/mock/f40-build-1466353-23686/root/chroot_tmpdir/scmroot/jakarta-servlet'...
$ git fetch origin 2458297af1f0048d2c704101f90faeea5cc079b5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jakarta-servlet
 * [new ref]         2458297af1f0048d2c704101f90faeea5cc079b5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2458297 Rebuilt for java-21-openjdk as system jdk