$ git clone -n https://src.fedoraproject.org/rpms/jakarta-activation.git /var/lib/mock/f38-build-side-42-init-devel-722130-27298/root/chroot_tmpdir/scmroot/jakarta-activation
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-722130-27298/root/chroot_tmpdir/scmroot/jakarta-activation'...
$ git fetch origin 2ceee22365841e0654008cb6caaaafcfd70fd1e2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jakarta-activation
 * [new ref]         2ceee22365841e0654008cb6caaaafcfd70fd1e2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2ceee22 Change license, reduce dependencies