$ git clone -n https://src.fedoraproject.org/rpms/webkitgtk.git /var/lib/mock/f41-build-1016930-17913/root/chroot_tmpdir/scmroot/webkitgtk
Cloning into '/var/lib/mock/f41-build-1016930-17913/root/chroot_tmpdir/scmroot/webkitgtk'...
$ git fetch origin 8b92690ea5e20567c58ff85a3670d4f42b681b65:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/webkitgtk
 * [new ref]         8b92690ea5e20567c58ff85a3670d4f42b681b65 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8b92690 Attempt to reenable LTO