$ git clone -n https://src.fedoraproject.org/rpms/why3.git /var/lib/mock/f38-build-side-42-init-devel-630270-26377/root/chroot_tmpdir/scmroot/why3
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-630270-26377/root/chroot_tmpdir/scmroot/why3'...
$ git fetch origin 77a922c5b99416cc4f70f640b3e0deed48d11aef:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/why3
 * [new ref]         77a922c5b99416cc4f70f640b3e0deed48d11aef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 77a922c Rebuild for coq 8.17.0