$ git clone -n https://src.fedoraproject.org/rpms/jakarta-activation.git /var/lib/mock/f40-build-2386758-60496/root/chroot_tmpdir/scmroot/jakarta-activation
Cloning into '/var/lib/mock/f40-build-2386758-60496/root/chroot_tmpdir/scmroot/jakarta-activation'...
$ git fetch origin e573c8b722f82cca08a955be9be1c66b888a2be1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jakarta-activation
 * [new ref]         e573c8b722f82cca08a955be9be1c66b888a2be1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e573c8b Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild