$ git clone -n https://src.fedoraproject.org/rpms/speedtest.git /var/lib/mock/f39-build-2138667-50838/root/chroot_tmpdir/scmroot/speedtest
Cloning into '/var/lib/mock/f39-build-2138667-50838/root/chroot_tmpdir/scmroot/speedtest'...
$ git fetch origin 740a87c400826d98e3677bca72a24451d39ee47e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/speedtest
 * [new ref]         740a87c400826d98e3677bca72a24451d39ee47e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 740a87c [packit] 1.2.1 upstream release