$ git clone -n https://src.fedoraproject.org/rpms/curl.git /var/lib/mock/f40-build-2433253-60692/root/chroot_tmpdir/scmroot/curl
Cloning into '/var/lib/mock/f40-build-2433253-60692/root/chroot_tmpdir/scmroot/curl'...
$ git fetch origin 9a38bdf948aacf59ec81f0e35ef10f430252f1a6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/curl
 * [new ref]         9a38bdf948aacf59ec81f0e35ef10f430252f1a6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9a38bdf fix: Leftovers after chunking should not be part of the curl buffer output