$ git clone -n https://src.fedoraproject.org/rpms/guvcview.git /var/lib/mock/f40-build-2691747-68153/root/chroot_tmpdir/scmroot/guvcview
Cloning into '/var/lib/mock/f40-build-2691747-68153/root/chroot_tmpdir/scmroot/guvcview'...
$ git fetch origin 42cddff910399a4840743076161bf6d83d4aa44d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/guvcview
 * [new ref]         42cddff910399a4840743076161bf6d83d4aa44d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 42cddff Switch from SDL2 to SFML to fix crashes on GNOME