$ git clone -n https://src.fedoraproject.org/rpms/pdfsign.git /var/lib/mock/f41-build-side-1-3070202-38790/root/chroot_tmpdir/scmroot/pdfsign
Cloning into '/var/lib/mock/f41-build-side-1-3070202-38790/root/chroot_tmpdir/scmroot/pdfsign'...
$ git fetch origin d5bf0534203a659f9a66b0987c0735253d76031f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pdfsign
 * [new ref]         d5bf0534203a659f9a66b0987c0735253d76031f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d5bf053 convert GPLv2 license to SPDX