$ git clone -n https://src.fedoraproject.org/rpms/jakarta-activation1.git /var/lib/mock/f38-build-side-42-init-devel-680232-26736/root/chroot_tmpdir/scmroot/jakarta-activation1
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-680232-26736/root/chroot_tmpdir/scmroot/jakarta-activation1'...
$ git fetch origin 23e13853511bfc63ef8438ae0181cc0c56594c9b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jakarta-activation1
 * [new ref]         23e13853511bfc63ef8438ae0181cc0c56594c9b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 23e1385 Add major compat version