$ git clone -n https://src.fedoraproject.org/rpms/apr.git /var/lib/mock/f40-build-799341-142260/root/chroot_tmpdir/scmroot/apr
Cloning into '/var/lib/mock/f40-build-799341-142260/root/chroot_tmpdir/scmroot/apr'...
$ git fetch origin d9cd0652c6953176ab5b6878d32a4739b4d8cbc3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/apr
 * [new ref]         d9cd0652c6953176ab5b6878d32a4739b4d8cbc3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d9cd065 always disable SCTP support at build time.